Changes in the lipid concentrations of the haemolymph during development in Orthetrum sabina (Drury) (Anisoptera: Libellulidae)

The total lipid concentration in the haemolymph increases in the different larval instars and reaches a maximum in the imago. Qualitative analyses of the different kinds of lipid reveal that the haemolymph has free fatty acids, phospholipids, mono-, di- and triglycerides in all larval instars as well as in the imago. Variations in the percentages of different lipid fractions are discussed with reference to the mode of life.